[6] She studied at the University of California at Los Angeles for a year,[2] then left and worked as a secretary for Hollywood director Rowland Lee.

[11] A contemporary review also credits Peggy Thompson for "cutting" (ie editing) the film, along with E. T. Gréville and Curt Alexander.

[6] There, she wrote the scenario for Midshipman Easy and assisted with the adaptation of Eleanor Smith's novel Ballerina for the screen[6] (its film title was The Men in Her Life).

[11] She reportedly found it embarrassing to see billboards proclaiming, "See Peggy Thompson's 'Whirlpool of Desire' - hotter even than Ecstasy.

"[11] In 1942, using the name Peggy Fenwick, she wrote a Christmas play called Among Those Present, which was performed at a church near Allentown, Pennsylvania.

[21] In 1950, under the name Peg Fenwick, she wrote a stage play called Meet the World, which the Los Angeles Times described as "an impressive stage event",[22] in which Fenwick showed "considerable understanding of present-day international problems ... in the parallel she drew with the founding of the United States.

[8][27] She was a member of the League of Women Voters,[8][26] and also worked as an activist in Brooklyn Heights to improve sanitation in the area in the 1970s.